US seizes and freezes funds at biggest Bitcoin exchange

Authorities in the US have reportedly frozen a mobile payments account associated with Bitcoin exchange MtGox, as part of an investigation announced Tuesday. Dwolla, an Iowa-based mobile payment startup, confirmed to Betabeat Tuesday that it has halted all activity associated with the account belonging to MtGox, after receiving a warrant from the Department of Homeland Security. A spokesperson for the US Immigration and Customs Enforcement (ICE) later told CNET that an investigation is underway, though she declined to comment on its scope or nature.